Eóghan MacDubhghaill (Anglicized:Ewan MacDougall,Ewan of Argyll orEwan of Lorne) was a 13th-century Scottish nobleman and warrior who was styled "King of the Isles", "Lord of Argyll". He was the son ofDonnchadh, son ofDubhghall, son ofSomhairle mac Gille Brighde.

According toScandinavian sources, after the death ofHaraldr Óláfsson, King of Mann and the Isles in 1248, KingHákon Hákonarson, King of Norway appointed Eóghan asKing of the Isles, though within a year that title went to Ewan's paternal second cousin,Dubhghall mac Ruaidhrí.^[2]

In response to Eóghan's assumption of this title perhaps, in 1249 KingAlexander II, King of Scotland launched an expedition against Eóghan after the latter refused to renounce his homage to Hákon. Alexander II fell ill and died on this expedition, but Eóghan seems to have been temporarily deprived of his Argyll possessions.

In 1250, Eóghan tried to obtain rulership of theIsle of Man, but was expelled by the inhabitants. He then travelled to Norway, hoping for recognition as King of the Isles. This attempt was unsuccessful. By 1255, KingHenry III, King of England had secured a deal for Eóghan whereby he regained Lorne and came into full Scottish allegiance.

When Hákon campaigned against the Scots in 1263, Eóghan refused the Norwegian king service and remained a Scottish loyalist. After Hákon's defeat at theBattle of Largs, Eóghan regained formal recognition as ruler of the Isles. His last recorded appearance is in 1268.

Eóghan's sonAlasdair followed him asLord of Argyll. His daughter,Maria (died 1302), married four times: 1stMagnús Óláfsson, King of Mann and the Isles, 2ndMaol Íosa II, Earl of Strathearn, 3rd Hugh,Lord of Abernethy, 4thSir William FitzWarin.

• "AM 45 Fol".Handrit.is. n.d. Archived fromthe original on 18 January 2016. Retrieved15 January 2016.
• Sellar, W. D. H., "MacDougall, Ewen, lord of Argyll (d. in or after 1268)", in theOxford Dictionary of National Biography, Oxford University Press, 2004 accessed 5 Dec 2006
• Woolf, Alex (2007), "A Dead Man at Ballyshannon: War and Society in the North Sea Region, 1150-1600", in Duffy, Seán (ed.),The World of the Galloglass, Dublin: Four Courts Press, pp. 77–85,ISBN 978-1-85182-946-0
• Unger, CR, ed. (1871).Codex Frisianus: En Samling Af Norske Konge-Sagaer. Oslo: P.T. Mallings Forlagsboghandel.hdl:2027/hvd.32044084740760.

• 1268 deaths
• Nobility from Argyll and Bute
• 13th-century rulers of the Kingdom of the Isles
• Clan MacDougall
• 13th-century Scottish nobility

• Articles with short description
• Short description is different from Wikidata
• Use dmy dates from April 2022
• Year of birth unknown